<template>
  <div id="box">
    <h1>App</h1>
    <ComA></ComA>
  </div>
</template>
<script setup>
import { ref, shallowRef, provide } from 'vue';
import ComA from './components/ComA.vue';


provide('title', 'hello Title')

</script>

<style>
div {
  border: solid;
  padding: 10px;
}
</style>